205305628 has 12 divisors (see below), whose sum is σ = 391947192. Its totient is φ = 93320720.

The previous prime is 205305577. The next prime is 205305631. The reversal of 205305628 is 826503502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 205305628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2332975 + ... + 2333062.

It is an arithmetic number, because the mean of its divisors is an integer number (32662266).

Almost surely, 2^205305628 is an apocalyptic number.

It is an amenable number.

205305628 is a deficient number, since it is larger than the sum of its proper divisors (186641564).

205305628 is a wasteful number, since it uses less digits than its factorization.

205305628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4666052 (or 4666050 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 205305628 is about 14328.4900809541. The cubic root of 205305628 is about 589.9297321276.

The spelling of 205305628 in words is "two hundred five million, three hundred five thousand, six hundred twenty-eight".